You can't always get master balls in any version of Pokemon, or so I've heard. You usually get a master ball once, unless you either clone it or look for it all around the Pokemon world. My advice to whoever wrote this question, don't use the master ball until the time is just right!
Okayy... now look over here and not at that useless JUNK!
To get masterballs in sapphire and ruby is the " Lucky Number thing " also in silver gold and crystal version you can clone the Pokemon. To clone them look at like " How to clone Pokemon in silver version " or something... anyway and in the Diamond and pearl you can clone too. idk how to obtain masterballs in red blue green and yellow version and idk about platinum too. but this... is all i no.
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Quick balls don't exist in sapphire.
give a Pokemon the masterball and put it in the daycare with a ditto then it will be cloned!!!!!!
hack the game
Attach your master ball to ONE POKEMON, next CLONE that Pokemon for how many master balls you want. Next detach them, and release all the clones (if you want)
use an action replay